<template>
  <div>
    <el-row :gutter="20">
      <el-col :span="24" :xs="24">
      <!-- 搜索表单 -->
      <el-form :model="queryParams" ref="queryForm" :inline="true" label-width="68px">
          <el-form-item label="名称" prop="categoryName">
            <el-input v-model="queryParams.categoryName" placeholder="请输入房型名称" clearable size="small" @keyup.enter.native="handleQuery"/>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery" >搜索</el-button>
            <el-button icon="el-icon-refresh" size="mini" @click="resetQuery" >重置</el-button>
          </el-form-item>
      </el-form>

      <!-- 数据操作按钮 -->
      <el-row :gutter="10">
          <el-col :span="1.5">
            <el-button type="primary" icon="el-icon-plus" size="small" @click="handleAdd">新增</el-button>
          </el-col>
          <el-col :span="1.5">
            <el-button type="success" icon="el-icon-edit" size="small" :disabled="single" @click="handleUpdate">修改</el-button>
          </el-col>
          <el-col :span="1.5">
            <el-button type="danger" icon="el-icon-delete" size="small" :disabled="single" @click="handleDelete" >删除</el-button>
          </el-col>
        </el-row>

      <!-- 数据展示Table -->
      <el-table v-loading="loading" :data="dataList" @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="50" align="center" />
        <el-table-column label="房型编号" prop= "categoryId" align="center" width="100"/>
        <el-table-column label="房型图片" align="center"/>
        <el-table-column label="价格" prop="price" align="center"  />
        <el-table-column label="房型名称" prop="categoryName" align="center"/>   
        <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
          <template slot-scope="scope">
            <el-button size="small" type="text" icon="el-icon-edit" @click="handleUpdate(scope.row)">修改</el-button>
            <el-button size="small" type="text" icon="el-icon-delete" @click="handleDelete(scope.row)">删除</el-button>
          </template>
          </el-table-column>
        </el-table>

         <!-- 分页加载 -->
         <el-pagination
         @size-change="handleSizeChange"
         @current-change="handleCurrentChange"
         :current-page="queryParams.pageNum"
         :page-sizes="[5, 10, 20, 50]"
         :page-size="queryParams.pageSize"
         layout="total, sizes, prev, pager, next, jumper"
         :total="total"
         >
        </el-pagination>

      </el-col>
    </el-row>
    
    <!-- 新增/修改对话框 默认不显示 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="房型" prop="categoryName">
          <el-input v-model="form.categoryName" placeholder="请输入房型名称" />
        </el-form-item>
        <el-form-item label="价格" prop="price">
          <el-input v-model="form.price" placeholder="请输入价格" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

  
  <script>
  import { listCategoryByPage,delCategory,getCategory,addCategory,updateCategory } from "@/api/category";
  export default {
    name: "Category",
    // 定义属性
    data() {
      return {
        // 遮罩层
        loading: false,
        // 表格数据
        dataList: [],
        // 查询参数
        queryParams: {
          pageNum: 1,
          pageSize: 5,
          categoryName: null,
          categoryId: null
        },
        // 选中数组
        ids: [],
        // 非单个禁用
        single: true,
        // 勾选1个或多个
        multiple: true,
        // 弹出层标题
        title: "",
        // 是否显示弹出层
        open: false,
        // 表单
        form: {},
        // radio: '1',
      rules: {
        categoryName: [
          { required: true, message: '请输入房型名称', trigger: 'blur' },
          { min: 2, max: 5, message: '长度在 2 到 5 个字符', trigger: 'blur' }
        ],
        categoryId: [
          { required: true, message: '请选择类别ID', trigger: 'change' }
        ],
      },
      // 总条数
      total: 0,
      }
    },
    // 计算属性，可选
    computed: {},
    // 监控data变化，可选
    watch: {},
    // 生命周期-创建完成，可选
    created() {
          this.getCategoryList();
        },
    // 生命周期-挂载完成，可选
    mounted() {},
    
    // 方法集合
    methods: {
      /** 查询数据列表 */
      getCategoryList() {
        this.loading = true;
        // 结果赋值this.dataList
        listCategoryByPage(this.queryParams).then(response => {
          this.dataList = response.data.list;
          this.total = response.data.total;
          this.loading = false;
        })
    },
      /** 搜索按钮操作 */
      handleQuery() {
        this.queryParams.pageNum = 1;
        this.getCategoryList();
      },

      /** 重置按钮操作 */
      resetQuery() {
        this.$refs.queryForm.resetFields();
        this.getCategoryList();
      },
      /** 修改按钮操作 */
      handleUpdate(row){
        this.resetForm();
        const categoryId = row.categoryId || this.ids
        getCategory(categoryId).then(response => {
          this.form = response.data
          this.open = true;
          this.title = "修改数据";
        })
      },
      /** 删除按钮操作 */
      handleDelete(row) {
        const categoryId = row.categoryId || this.ids
        this.$confirm('是否确认删除ID为"' + categoryId + '"的数据项?',"警告",{
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        })
        .then(function () {
          return delCategory(categoryId);
        })
        .then(() => {
          this.getCategoryList(); // 刷新数据
          this.$message.success("删除成功");
        })
        .catch(() => {});
      },
      // 多选框选中数据
      handleSelectionChange(selection) {
        this.ids = selection.map(item => item.categoryId)
        this.single = selection.length!==1
        this.multiple = !selection.length
      },
      /** 表单初始化 */
      resetForm() {
      // 可进行数据初始化工作
      this.form = {
        categoryName: null,
        price: null
      }
    },
       /** 新增按钮操作 */
       handleAdd() {
        this.resetForm();
        this.open = true;
        this.title = "添加数据";
      },
      
    /** 提交按钮 */
    submitForm: function () {
        this.$refs["form"].validate(valid => {
          if (valid) {
            if(this.form.categoryId != null){
              updateCategory(this.form).then(response => {
                this.$message.success(response.msg);
                this.getCategoryList();
                this.cancel();
              })
            }else {
              addCategory(this.form).then(response => {
                this.$message.success(response.msg);
                this.getCategoryList();
                this.cancel();
              })
            }
          }
        });
      },
      /** 取消按钮 */
      cancel() {
        this.open = false;
        this.title = "";
        this.resetForm();
      },
      
       /** 处理分页 */
       handleSizeChange(val) {
        this.queryParams.pageSize = val;
        this.getCategoryList();
      },
      handleCurrentChange(val) {
        this.queryParams.pageNum = val;
        this.getCategoryList();
      },

      
    },
    
  }
  </script>

<style scoped lang="scss">

</style>
